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RE: GCC with formal testing docs

On 24 July 2007 07:42, ?? wrote:

> Hi:
>    I know GCC is a wonderful compiler collection. I like it and trust
> it. But, I can't find any formal docs about Testing GCC, both unit
> testing and integrat testing. I think, as a software, GCC should be
> tested and own a test report.
>    Can someone give me some infomation about how the GCC workteam test
> it? Lexical analysis, syntactical analysis, RTL generation ... or
> testing from other aspects.
>    Maybe I ask a strange question, maybe it isn't worth thinking:).

  There's no such thing as strange questions, just strange people asking them.
Err...  wait a minute, that doesn't sound quite right!

> I'm interested about it. Also I need your help. Thank you! ^_^

  Quick summary:  GCC does not have any formal unit testing.  There are a lot
of run-time consistency checks that can be compiled in by configuring with
--enable-checking, and these cover a lot of the same basic
are-things-doing-what-we-expect-them-to ground that unit tests would.

  Apart from that, GCC also has a vast regression testsuite.  (It's slightly
misnamed; some of the testcases are more like unit tests, but most of them are
real code snippets that have uncovered bugs in GCC in the past, so we'll see
if the same bug ever recurs).  This is one of the main metrics most people use
to test GCC.  Many of the tests are cleverly designed to probe at some of the
inner workings of the compiler, by examining tree-dumps and assembler outputs.
for the internal documentation on the testsuite framework.  See also the GCC
wiki page on the subject:

  Also, as described at, there are a number of
individuals and teams running continuous integration tests, including
regression tests.  There are also projects which measure and track gcc
performance in terms of time and memory usage and generated code time and
memory usage over the long term; see for CSiBE
and others.

Can't think of a witty .sigline today....

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